Type-writing machine.



.PATBNTED F8811, 1908. J. C. MQLAUGHLIN. TYPE WRITING MACHINE.

APPLICATION FILED 00T. 6, 1905.

' 3 SHEBTS-SHEET 1.

PATENTED IEB. 1I, 1908.

J. C. MOLAUGHLIN. TYPE WRITING MACHINE.

APPLICATION FILED 00T. 6, 1905.

3 SHEETS-SHEET 2.

Nm I L. H G U A L M C. J.

TYPE WRITING MACHINE.

3 SHEETS-SHEET 3.

APPLICATION FILED 00T. 6. 1905.

I UNITED sTATEs PATENT oEEioE.

JOHN c.

M CLAUGHLIN, QF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

. TYPE-WRITING MACHINE'.

4- Specification of Letters Patent.

Patented Feb. 11, 190s'.

'Application filed October 6. 1905. Serial No. 281.660.

ifibrated to cover and uncover the printing point atthe ty e strokes.`

Thepbject ov the invention is to provide commercially practicable means for permitting the type impressions to be made in ink of different colorsat will. This-feature. of operation is desirable not only in cases where it is desired to emphasize a word by writing it in ajcolor which contrasts with. the body of the writing, but also incases where it is desired to car ribbons'upon t e machine; the formerl for writing legal documents and the latter for` letters.

In carrying out `my invention I ernplo two ribbons and two vibrators, one for eac ribbon, whereby it may be caused; to cover and uncover the rinting pointat thetype strokes. For eac ribbon I provide -a ypair of spools, and in' thecase of front strike writing machines, 1,. lprefer to place one pair of spools between t e `spools of the'other pair,

' so lthat two spools are mounted edgeto edge upon c ach side of the printing point or at each side ofthe machine. I provide a winding-mechanism which can .be connectedy to either pair of,spools at will, and I also provide means for callingv into action vthat vibrator which carries the ribbon that 4is wound upon that pair of spools which is associated at'the time with the winding mechanism, so that when either ribbon is Winding, it is also being vibrated to cover the printing point at the type-strokes, while the other ribbon is neither winding nor being vibrated. I also provide means for silencin both- 'the vibrating .mechanism and the win ing mechanism, whereby stencils may be written.

In the accompanying drawings, in which my improvements are shown applied -to the well known Underwoodl front strike. writing machine, Figure l 1s alrear elevation of -seenat Fi 1.

both record .and .copying the ribbon mechanism, showing the front ribbon elevated to cover the printing point,

and showing the spools which carry said ribbon connected to the winding mechanism. Fig. 2 is a plan of parts seen at Fig. 1. Fig. 3 is a plan to illustrate the manner of silencing the ribbon vibrators. Fig. 4 is a similar plan to illustrate `the manner of operating the vibrator .that'carries the retin-ribbon. Fig. 5 .is a sectional side elevation. of parts detail of t e means for calling either ribbonvibrator into action.

adapted to strike through either a front ribbon, 4 or a rear ribbon 5, which are 'of different colors orqualities. The front ribbon 4 is wound upon a air of' spools 6, 7

mounted at opposite si es of the printing.` point and in front of the platen, with their..

edges toward the latter and contained in a pair of cups `8, 9. The ribbon which extends etween these s cols is threaded through a..

vibrator 1() stan ing in front of the platen.

The'rear ribbon 5 is wound upon a pair of= spools 11, 12, carried in cups 13, 14 and. t

readed through a vibrator 15, which isl mounted between the vibrator 10 and the platen. It will be. seen' that the pair of s ools 6, 7 is between the spools l11, 12,`so t at two spools lie with their resp ective flanges placed edge toward edge uponA each side .ofi

the printing point; the rear ribbon 5 extending 1n rear of the cu s 8, 9. In said Under.-v wood" machines, type bars press rearwardly a curved unrversalbar 16, which is fixed u on the-front end of a 4frame or table, 17, the atter carried at its rear end `upon.- upright' rock-arms .-118

ivoted at 19 and operating a slottedarm 20.

he latter `enga es a pin 21 ,of a crank 22 fixed upon a roei-shaft 23, the latter having at each side of the machine an arm 24 carrying a pawl 25 to engage a ratchet wheel 26 for winding the ribbon.

as at the left hand si'de of Fig. 1,- and the `other pawl 25 ou`t 'of action, as-at the right hand side of said figure, thus reversing the of said pawl and ratchet mechanism, I rotate Fig. 6 is a side elevation of a..v

Upon the front side of a platen 1 strike. `types 2, carried upon type bars 3"and.

In said vmachine av shifter bar 27 throws one pawl 25 into-action,

eels provided upon '.the

gears 28, 29, the gears 29 fixed upon the ower ends` ol' vertical shafts 30, 31, which at their upper ends carry gears 32, 33. The gear 32 is mounted between gears 34, 35 carried by shul'ts 36, 37 upon which are mounted the spools 1], 6. The gear 33 is mounted between adjacent gears 38, 39 fixed upon shafts 40, 4l upon which are mounted spools 7, 12. At Fig. 1 the winding gear 32 is being driven by the pawl 25 and is in mesh with the gear 35 to wind the ribbon 4 on the spool 6; while the gcar`33 in mesh with turns idly during the delivery of the ribbon from the spool 7; said gear 33 being disconnected from its pawl 25.

Various means may be adopted for ell'ecting a relative shifting movement ol' the gears, but that illustrated 1s in the nature ol' a con- `trivance whereby the spools upon either side of' the printing point vare together shifted either towards or from the spools upon the other side of the printing point, so as to disconnect one pair of spools from the main Winding gears 32, 33 and connect the other pair of spools to said gears. cups 13, and 8 are mounted by means of supports 42 upon a slide 43 guided by studs 44; and the cups 9, 14 are mounted upon a slide 45 guided by studs 46, so that said slides may move transversely of' the machine towards and from each other. Such movement is effected by means of a pair of keys 47, 48

mounted upon the ends of a lever 49, which between its ends is fixed upon a rock-shaft 50 extending rearwardly and having upon its rear end an upstanding arm 51, which by the depression of said keys'is caused to vibrateA i `nected by an arm 54 to the slide 43 Which carries the spools at the left side of Fig. 2, so that the vibration ot said arm 51 causes a movement of the spool-carrying slide 43 in the same direction. The other end of the operating bar 52 is pivotedby a screw 55 to one end of a lever 56, the other end of which is ivoted at 57 to the other slide 45; said lever eing pivoted midway between its ends by means of a screw 58 upon the framework 59 of the typewriting machine, whereby said slides 43 and 45 are caused to move towards each other by depression of the key 47, and

To this end thev with the vibrators are shifted up and down f at the platen-shifting movements of said machine. Said levers are operated by means of a pair of" upstanding levers 68, and 69 pivoted at their lower ends at 70, upon some fixed portion ofthe machine, and having at their upper ends yvertical slots 71 and 72 to engage pins 73 and 74 provided upon upstandin arms 75 and 76 of the levers 63 and 64; sai

slots accommodating the up and down move` ments of the levers at the case-shift operation. By vibrating either. lever 68 or 69, its associated lever 63 or h4 is caused to throw up its attached ribbon vibrator 10 or 15. These levers 68, 69 are actuated by the univcrsal bar Jframe 17, but only one lever can be actuated at a time; said frame carrying a slide 77 guided by studs 78 and having a toe 79 to engage either lever 68 or 69 according to the adjustment of the slide. At Figs. 1, 2 and 5, said toe is shown in osition to engage the lever 68; while at, i 4 it is shown in position to engage the ever 69.

When it engages either lever, the other lever stands idle so vthat only one vibrator at a time is cal ed into action. The shifting of said slide 77 is effected by la vertical in 80, extending up tothe shift bar 52 and ed to thelatter. The. movement of said bar 52 for connecting the windingmechanism to either .pair of spools, is also effective through the pin 80`to shift the slide 77 upon the frame i 17, so that the toe 79 will operate that lever 68 lor 69 which controls the ribbon-vibrator carryingjthe ribbon which is Wound-upon A.the active spools. 'The pin 80 is loosely connected to the slide 77 by means of a fork 81,.

so asto accommodate the backward and forward movements of the slide at the operation of the universal bar frame. Springs 82 mounted upon the frame 17 'bear lightly against the rear edges of the levers 68 and 69 the winding gears 32, 33,t therebysilencing .34, 35, 38v and 39 will stand out of mesh with the winding mechanism, so that stencils may be written without any activity Whatever upon the part of either ribbon.

vio

Variations may be resorted to within the scope of my invention |and portions of my im rovements may be used without others. aving thus described my invention, I

claim:

4 the printing point at every typev stroke.

2. In a front strike writingmachinehaving a type-operating mechanism, the combination with a platen, of two pairs of ribbon spools all mounted with vtheir respective flanges placed edge toward edge infront of the platen so that the ribbons' extending between the spools are superposed, one pair of spools mounted between the s ools of the other pair, means for winding eit er spool of.v

either pair, and means for enabling the typeoperatm mechanism to cause the'rib-bon upon eit er pair of spools to cover and uncover the printing pomt at the type strokes.

In a typewriting machine having a ltype-operating mechanism, the combination with two pairs of spools, of means for winding either spool of eitherfpair While the spools in the other air .re'main stationary, and means i'or'enabling the type-keys-to cause the ribbon upon either pair of spools to vibrate during the type strokes to cover and uncover the printing point.

4. In a ty lewriting machine, the combination with aplaten and types mounted vto strike upon the iront side thereof, of two fpairs of spools mounted with their respective anges edge toward edge in front of the platen, one pair between'the's ools ofthe other pair, means for causing t e ribbori'upon either pair to vibrate to cover and uncover the printing point during the type strokes, and means for winding the ribbon back and forth upon either pair of spools while the spools. in the other pair remain stationary.

5. In a typewr1ting machine having a type-operating mechanism including type keys, the combination with two pairs of spools', of a spool-winding mechanism, means for causing either pair of spools to be operated by said winding mechanism while the other pair remains stationary and means for enabling the type-keys to cause the ribbon upon either pair of spools to cover the printing point at the type strokes.- l

6. In a typewritmg machine, the combination with two pairs of s ools, of a spoolwinding mechanism, a s ifting device for connecting either pair of spools to said winding mechanism, and means connected to said shifting device for causing to cover the printing point that ribbon which is carried bythe mechanism,

spools/Which are connected to the Winding mechanism.

7. 'In a typewriting machine, the combination with two pairs of spools, of .a spool winding mechanism, a shifting device for connecting either pair of spools to said winding and means o erable simultaneously with said shifting c evice, for causing to cover and uncover the printing point atthe typestrokes that ribbon which is carried by the spools which are connected to the winding mechanism.

8. In a typewriting machine, the combination with a platen and types mounted to strike upon'tthefront side thereof, of two pairs of spools mounted with their respective flanges placed edge toward edge in front of the platen, two spools at each side of the printing oint, one 4pair of spools between the spools o the other pair, two vibrators for causing the ribbons to cover and uncover the printing point, a spool Winder at each side of theI printing point, means for effecting cooperation between said winders and either pair of said spools, means for bringing into action the vibrator which is associated with the spools with which the winders cooperate, and means for reversing the direction of ro-r tation of said winders.

9. In a typewriting ,machina the combination with a platen and types mounted to strike thereon, of two airs of s ools mounted with their respectnfeflanges p aced' edge toward edge, one pair of spools between the spools of the other pair, so that two spools are at each side of the printing point, gears upon all of said s ools,` a reversible winding gear at each si e of the printing point, each winding gear being mounted between two adjacent spool gears, and means for effecting shifting movements between the spool gears and the winding gears.

10; In a .typewriting machine, the comedge toward edge, one pair of spools between the spools of the other pair, so that two spools are at each side of the printing point, gears upon all of said spools, a reversible windingl gear at each side of the printing point, each winding gear being mounted between the two adjacent spool-gears, and means for shifting both pairs of spools later- 'ally in such a manner as to effect disconnection of the winding gears from one pair of spools and connection of said winding gears to the other pair of spools.

11. In a typewriting machine; the com- 'bination with a platen and types mounted to strike thereon, of two pairs of spools mounted with their respective flanges laced edge toward edge, one pair of spoo s betweenthe spools of the other pair, so that two spools 'SG' strikeithereon, of two pairs of spoolsl laced are at each side of the printing oint, gears upon all oi said spools, areversi le wlnding gear at each side of the printing point, each winding gear being mounted between the two adjacent spool-gears, and means' for shifting both pairs of spools laterally in such a manner as to ellect 'disconnection of the` -spools of the other air, so that two spools are at each-side of t ie'printing oint, a carrier upon which are mounted t ie spools at one side of the printingpoint, a carrier 'upon which the other spools are mounted, means connecting said carriers to cause them 4to move ,simultaneously in opposite directions,

gears upon the spools, and winding gears one- -at each side of the priptmg pomt between the spool gears.

13. In a typewriting machine, the combination with a platen and types mounted to .with their respective ianges placed e ge t0- trier -u on which are mounted Vward ledge,l onenpair of spools between the spools of the other n pair, so that two spools are at each side of t i e printing oint, a carespools at one si e of the printing point, a carrier upon which the other spools are mounted, meansconnecting said carriers, to cause them to move simultaneously in opposite directions,`

. gears upon the spools, and winding gears one ateach side 'of the printing point between the spool ears; means for detaining said carriers in di eren't positions, two'ribbon vibrators mounted at the printing point, one for each pair of spools, and connections between said vibratorsiand said carriers such that when the carriers are shifted in either direction, the correspondin vibrator is brought into effective `action w ile the other vibrator is rendered ineffective.

'514. In a typewriting mach-ine having a type-o erating mechanism, the combina-- tion with two ribbon vibrators and two pairs of ribbon spools for carrying the ribbons threaded through said vibrators, of means controlled by the type-operatingA mechanism 'for vibrating the ribbons to cover and uncover the' printing point, a finger-piece, and means controlled by the latter for .both rendering either vibrator effective and the other vibrator ineffective and also' causing the winding of the ribbon which is threaded through the effective vibrator.'

15. In a typewriting machine having a or 4causing either ribbon to be wound by said winding meansfwhiley the other ribbon remains stationary, two vibrators for causing the ribbon to cover and uncover, the printing point atV the type strokes, and means also controlled by saidV finger-piece for calling into action thel vibrator which carries the winding. ribbon arid-rendering the @ther vibrator ineffective.

171.v In a typewritving machinehaving a platen shifting up and down, the combination with a universal' bar frame, of a lever pivoted upon the yframework and engaged by said frame and having a vertical slot, and a ribbon-vibrating lever shiftable up and down with said platen' and having a pin in engagementwithsaidslot. Y

18. In a .typewriting machine, the combination with a universalbar frame, of a' plurality of levers directly en ageable by said frame, and a lurality of rib )on vibrators one 'behind the Stille-rand o erable by said levers means being rovide `for silencing either vibrator at wil v 19, In a typewriting machine, the combination with a universal bar frame, of a lurality of levers, shiftable means for enab ing said frame t'o engage either of said levers at will, ribbon vibrators, and levers connected to' said vibrators and operable by said levers.

- 20. Inra typewriting machine, the coinbination with a winding-mechanism and two pairs of spools, of a shifting member for causmg co eration of said winding mechamsm 'with eit erpair of 'spools at will, a pair of ribbon vibrators for the ribbons upon said spools, a universal bar,rlevers connected to said vibrators and operable b f said frame, and means connected to said shiftin device for causing either of said levers to e operare at each side of the printing point, a bar extending transversely of the machine and having at its ends means for connecting said winding mechanism with either pairof spools,

a nger-piece forfsaidbar, means for detaining said bar in different positions, two ribl .ing said levers.

22. ln a typewriting machine, the combination with two slides, of two spool receiving cups mounted upon eachof said slides, .connections between said slides to enable Jthem to recede from and approach eachother, f-spmdles mounted in said slides, one in each of said cups, for receiving the spools, gears upon said spindles, and a ,winding gear mounted upon the framework of the machine between adjacent spindle gears.

23. In a typewriting machine having a tvpti-operating mechanism, the. combination with two pairs of ribbon spools, of means for enabling the type-operating mechanism to cause the ribbon on either pair to vibrate to cover and uncover the printing point at the type strokes, and for silencing the ribbon vibrating means at the type strokes, at will.

24. In a typewriting machine having a t -vpe-operating mechanism, the combination with two pairs of ribbon spools, of means for winding the ribbon back and forth upon either pair of spools, and means for enabling the type operating mechanism to cause. the ribbon on either pair to vibrate to cover and uncover the printing point at the type strokes, and for silencing the ribbon vibrating means at the type strokes, at will.

25. In a front strike writing machine having a type-operating mechanism the combination with. two pairs of ribbon s ools placed with their respective ilanges paced edge toward edge, of means for winding either spool of either pair, means for silencing.A the winding means, and means for enabling the type operating mechanism to cause the ribbon upon either air ofspools to cover the printing point at t e type strokes while the ribbon upon the other pair of spools remains idle.

26. In a front strike writing machine having a type operating mechanism and a platen, the combination of two pairs of ribbon spools mounted with theirl respective flanges placed edge toward edge in front of the platen, one pair between the spools of the other pair, means for winding either spool of either pair, means for silencing the winding means, and means for enabling the type operating mechanism to cause the ribbon upon either pair of spools to cover and uncover the printing point while the ribbon upon the other pair of spools remains idle.

27. In a typewriting machine having a type-operating mechanism, the combination with two pairs of spools, of means for winding either spool of either pair while the spools qin the other pair remain stationary,

means for silencing the Winding means,`and means for enabling the type-operating mechanism to cause the ribbon upon either pair of spools to cover the printmgvpoint or to remain out of use at the type strokes, at will.

28. In a typewriting machine having a type-operating mechanism, the combination with two pairs of spools, of means for winding either spool of either pairI While the spools in the other pair remain stationary, and means for enabling the type-operating mechanism to cause the ribbon upon either pair of spools to cover and uncover the printing point, or both ribbonsto remain out of use during the type strokes, at will.

l2t). In a typewriting machine having.a platen, types mounted to strike upon the front sidethereof, and a type-operating mechanism, the combination of two pairs of spools mounted with theirv respective flanges placed, edge toward edge in front of the platen, one pair between the spools of the other-pair, means for enabling the type-operating mechanism to cause the ribbon upon either pair to vibrate to cover and uncover the printing point or both ribbons to remain out of use during the type strokes, and means for Winding the ribbon back and forth upon either pair of spools while the spools in the other pair remain stationary.

30. In a typewriting machine having a type-operating mechanism, the combination with two pairs of spools, ofl a spool-Winding mechanism control ed by said type-operating mechanism, and means for causing either pair of spools to be operated by said winding mechanism while the other pair remains stationary and means for silencing the winding means.

31. In a typewriting machine type-operating mechanism, the combination with two pairs ofs ools, of a spool-winding mechanism, control ed by the type-operating mechanism, and means for causing either .pair of spools to be operated by'said Winding 110 mechanism while the other air remains stationary; vibrators controlle by the typeoperating mechanism for causing the ribbon upon either pair of spools to cover the printing point, and means for simultaneously silencing both the vibrators and the Winding means. Y

32. In a typewriting machine, the cornbination with two pairs of spools, of a spoolwinding mechanism, a shifting device for connecting either pair of spoolsv to said winding mechanism, vibrators `connected to said shifting device for causing to cover the printing point that ribbon which is carried by the spools which are connected to the Winding mechanism, and means controlled by `said shifting device for-silencing both the winding mechanism and the vibrators.

33. In a typewriting machine, the combination with tw o pairs of spools, of a spool having a 105 winding mechanism, a shifting device for.

connecting either pair of spools to said winding mechanism, and means operable siiniiltaneously with said shifting device, for either causing to cover and uncover the printing is carried by the spools which are connected to the winding mechanism, or for causing both ribbons to remain out of use during the.

type strokes.

34. In a typewriting machine, the coinbination with a platen and types mounted to strike 4upon the front side thereof, of two pairs of spools mounted with their respective flanges placed edge toward edge in front of the platen,'two spools at each side of the printing oint, one pair of spools between the spoo s of the 4other pair, two vibrators for causing the ribbons to cover and uncover the printing point, a spool Winder at each side of the printing point, means for effecting coperation between said winders and either pair of said spools, means forbringing into action the vibrator which is associated with the spools with which the winders cooperate, or causing both ribbons to remain idle during the type strokes, and means for reversing the direction of rotation of said winders or silencing them both.

35. In a typewriting machine, the combi'nation with a platen and types mounted to strike thereon, of two pairs of spools mounted with their respective flanges placed edge toward edge, one pair of spools between the spools of the other pair, so that two spools are at each side of the printing point, gears upon all of said spools, a reversible winding gear at each side of the printing point, each Winding gear being mounted between-two `adjacent spool gears, and means for effecting the spools ofthe other pair, so that two spools are at each side of the printing point, gears upon all of said spools, a reversible winding gear at each side of the printing point, each Winding gear being mounted between the two adjacent spool-gears, and means for shifting both pairs of spools laterally in such a manner as either to eect disconnection of the winding gears from one pair of spools and connection of said winding gears to the other pair of spools, or to silence thewinding meehanism, at will.

37. In a typewriting machine, the combination with a platen and types mounted to strike thereon, of two pairs of spools mounted with their respective flanges placed edge to-l will.

ward edge, one pair of spools between' the spools of thel other pair, so that two spools are at each side of the printing point, gears upon all of Vsaid spools, a reversible winding t t tl t t l H t .l b l l gear at each side of the printing point, each poin a ie ype s ro (es via ri) on w nei l winding gear being mounted between the two adjacent spool-gears, and -nieans for winding gears to the other pair of spools or to silence the winding devices, at will; a pair of ribbon-vibrators, one for each ribbon, and

means connected to said shifting means for rendering one vibrator effective and the other ineffective, or to silence both vibrators, at

38. In a typewriting machine, the combination with a platen and types mounted to strike thereon, of'two pairs of spools placed with their respective lflanges placed edge toward edge, one pair of spools between. the spools of the other pair, so that two spools are at each side of the printing point, a carrier upon which are mounted the spools at one side of the printing point, a carrier upon which the other spools are mounted, means connecting 'said carriers, to cause them to move siiiiulanteously in opposite directions, gears upon the spools, and Winding gears one at each side of the printing point between the spool gears l:,nieans for detaining said carriers in different positions, ltwo ribbon vibrators mounted at the printing point, one for each pair of spools, and connections between said vibrators and said carriers such that when l'oo the carriers are shifted in either direction, f

either one vibrator is brought into effective action while the other vibrator is rendered ineffective, or both vibrators are silenced.

39. In a typewriting machine, having a type-operating mechanism, the combination with two ribbon vibrators actuated by the type-operating mechanism, and two pairs of ribbon spools for carrying the ribbons threaded through said vibrators, of a fingerpiece, and means operable by the latter for' both rendering either vibrator effective and the other vibrator ineffective and'also causingl the winding of the ribbon lwhich is threaded through the effective vibrator, or silencing both t-he winding means and the. vibrators.

40. Ina typewriting machine having a type-operating mechanism, the combination with means for supportin two ribbons and means for causingeither ri bonl to wind while the other remains stationary, of means operated by the type-operating mechanism for reversible winding .I means, a finger-piece,

means controlled by said finger-piece for p causing either ribbon to be wounc by said winding means while the other ribbon. remains stationary and for silencin the winding means, two vibrators contro led by the type-operating mechanism for causing the ribbon to cover and uncover the printing lpoint at the type strokes, and means also controlled by said tin er-piece for calling into action the vibrator w ich carries the winding ribbon and rendering the other vibrator ineffective, and alsofor silencing both vibrators simultaneously.

42. In a typewriting machine, the combi nation with a winding mechanism and two pairs of spools, of a shiting member for causing cooperation of said winding mechanism with either pair of spools or silencing all the spools at will, a. pair of ribbon vibrators for the ribbons upon said spools, a universal bar, levers connected to said vibrators and operable by saidframe, and means connected to said shifting device for causing either of said levers to be operated by said universal bar, so that the latter will be caused to vibrate that ribbon which is carried bythe spools that cooperate said winding mechanism, or for silencing both vibrators.

43. In a typewriting machine, the combination with two pairs of spools and a. gear for each spool, said spools placed with their flanges extending'edge toward edge, of two winding wheels, means for connecting the winding wheels to either pair of spool gears, and means for reversing the direction of wind ing of the ,wheelsp 44;' In a front-strike writing machine, the combination with two winding members, one at each side of the printing point, of two pairs of'spools infront of the platen and connectible in alternation with said winding gears said spools placed with their perspective flanges extending towards one another.

45. In an ink-ribbon mechanism, the coni- ,bination of spools for two ink-ribbons; in-

dependent vibrators for said ribbons; means for operating' either of said vibrators singly; ribbon driving devices connectible with a spool of either ribbon; a finger-lever, and connections from said lever for shifting the vibrator operating means from one to the other vibrator and for disconnecting the driving devices from one and connecting them to the other set of ribbon spools.

46. In an ink-ribbon mechanism, the combination of sets of spools for two ribbons; independent vibrators for said ribbons; vibrator operating mechanism provided with a member shiftable t0 connect-said mechanism with either vibrator singly; ribbon-driving devices connectible with either set of spools singly, and a member shiftable to effect disconnection of either set of spools from and with either vibratorsingly; ribbon-driving devices connectible with either set of spools singly, av member shit'table to`eil`ect disconnection of either" set of spools from and coi inection'of the'otlier set of spools with said ribbon-driving devices, and hand operated means for simultaneously moving both of said shiftable members.

48. In an ink-ribbon mechanism, the coinbination of separate sets of spools for different ribbons; independent vibrators for said ribbons; a to andfro moving member for actuating said vibrators; means for connecting said member with and disconnecting it from said vibrators to operate them singly; ribbon driving devices; a member shiftable to connect the ribbon driving devices with said sets of spools singly; and a key for operating said shiftable member and said connecting and disconnecting means.

49. In a typewriting machine, the combination with two pairs of spools and a gear for each spool, of two winding gears, means for connecting the winding gears to either pair of spool gears, and means for reversing the-direction of winding of the ribbons.

50. In an ink-ribbon mechanism, the coinbin-ation of spools for two ink-ribbons; vibrators for said ribbons; means for operating eitherof said vibrators singly; ribbon driving mechanism connectible with a spool of either ribbon; and means for connecting said driving mechanism and said opera-ting means with aspool and the. vibrator respectively of any of said ribbons.

51. In a ribbon-mechanism, the combination of spools for different `ink-ribbons; independent vibrators for said ribbons for covering and uncovering the printing point means sliiftable from one to another of said vibrators for actuating said vibrators singly;

means shiftable from one to another of the singly, to cover and uncover the. printing point.v n

53. In a typewriting machine, the conibiiiation with tvpe-operating devices and two pairs of ribbon spools, ol' two ribbons Wound upon said spools, one ribbon upon each pair of spools,and means for enabling all the type-operating devices to vibrate either ribbon to cover and uncover the print-- ing-point at the type strokes, at will.v

54. In a typewriting machine, the combination with type-operating devices and two pairs of ribbon spools, of means connected to f au the keys for Winding the ribbonback and ribbons, one ri forth upon either pair of spools, and means for enabling all the type-operating devices to cause the ribbon on either pair of spools to vibrate to cover and uncover the printing pointat the type strokes, at will.

55. In a typewriting machine, the combination with type-operating devices, of two ribbons, shiftable means for enabling either ribbon to cover and uncover the printing point at the type strokes, two pairs of spools upon which said ribbons are wound, one ribbon u on each pair, and means connected to said ls iftable means to cause the spools of the active ribbon -to wind. I

56. In a typewriting machine, the' combi nation with type-operating devices, of'two ribbons, twoJ airs of spools carrying said lribon upon each'pair, shiftable means for winding either spool of either pair while the spools in the other pair .remain stationary, and means connected to said shiftable means for enabling all the type-v operating devices to cause the winding ribbon to vibrate to cover and uncover the printingr point at the type strokes.

57. In a typewriting machine, the combi# nation with a platen and type-operating devices, oi two pairs of spools, one s ool in each pair mounted at eaci side of tie printing point, s col-winding means mountedat each side of t 1e printing point, means for effecting ooperation between the winding means and either each ri bon, an shiftable means for enabling all the typeoperating devices to reciprocate at each type stroke the vibrator which carries the winding ribbon. y -f 58, In a typewriting machine, the combination with'a platen and t e-'operating devices, of two pairs .ofspooirsl` a ribbon upon pair of s ools, two vibrators, one fory vices, of two pairs of spoolsa ribbon upon each pair, lgears upon all of said s ools, relversible winding gears, means forv eecting a shifting movement between the vs col gears and the Winding gears to cause eit er ribbon to wind a vibrator for each vof said ribbons, i

and means for enabling all of; the typeoperating devices.l to operate that -vibrator 'which carries the Winding ribbon, while the other vibrator remains stationary.v l

60'. In a front strike writing machine, the combination with aplaten and type-o erating devices, of two upright revoluble s, afts,

one on each side of the printingpoint, twopairs of spools, one pan' for.

ribbons, and -two each ribbon, the spools in each pair being loeated one on each side of the rinting point,

means toconnect either shaft o either of the spools on the same side of the printin oint to wind the same, vibrators for said ribons, and means operable by all the t e-operating devices and connectible to `sai vibrators to cause the winding ribbon to cover andimcover the printing point at'the type strokes.

61. In a-ty'pewriting machine, the combi-l nation with a platen and type-o erating devices, of two pairs of ribbon spoo s, the spools in each pair eing mounted one at each side of the printing` point, gears for all'of said spools, a winding gear at each side of the printing point and connectiblev to either of the spool gears, means for effecting shifting movements between the'spool gears and the winding ears and to cause any one of the four spoo s to wind singly, and 'means operable by all the type-operating devices'. to vibratel the Winding ribbon to cover and uncover tlie printing oint at the t JOI C. MCLAU 'HLIN.

Witnesses:

H. H. ELoR,

B.. C. Srroxmrr.'

e strokes. 

